SystemSet

Defined in: ecs/system.ts:281

A named group of systems. When registered via App.addSystemSet, every member gets the set’s runIf and its runBefore / runAfter edges — the group’s ordering written once instead of per system. Other systems or sets may also reference the set’s name in their own edges; the scheduler expands such a reference to every member of the set.

Build one with defineSystemSet; the underscore-prefixed fields are the scheduler’s, not an authoring surface.